A Parameterization of Groundwater Table in a Land Surface Model and Its Applications
陆面过程模式中地下水位的参数化及初步应用

Field observations have shown that there are important interactions between surface water and groundwater which are closely related to the state of soil moisture. Soil moisture plays an important role not only in the energy and water budgets in the land atmosphere system, but also in the drought and flooding, the water resources management, ecological system, and water quality studies. Hence, studies on the interactions and dynamic representations of groundwater table in a land surface model are of significance on climate and water resources. We present a new numerical model for dynamic representation of groundwater table by using the mass lumped finite element method through reducing it to a moving boundary problem on saturated and unsaturated zone, which is coupled with a land surface model VIC. Numerical simulations shows good agreement between the ground well observations and the simulated groundwater tables that are obtained from the combination of the newly developed model and VIC.